MC9S12HZ256 Datasheet, PDF (623/692 Pages) Freescale Semiconductor, Inc – HCS12 Microcontrollers

Appendix A
Electrical Characteristics
A.1 General
This supplement contains the most accurate electrical information for the MC9S12HZ256 of
microcontrollers available at the time of publication.
This introduction is intended to give an overview on several common topics like power supply, current
injection etc.
A.1.1 Parameter Classification
The electrical parameters shown in this supplement are guaranteed by various methods. To give the
customer a better understanding the following classification is used and the parameters are tagged
accordingly in the tables where appropriate.
NOTE
This classification is shown in the column labeled “C” in the parameter
tables where appropriate.
P: Those parameters are guaranteed during production testing on each individual device.
C: Those parameters are achieved by the design characterization by measuring a statistically relevant
sample size across process variations.
T: Those parameters are achieved by design characterization on a small sample size from typical devices
under typical conditions unless otherwise noted. All values shown in the typical column are within this
category.
D: Those parameters are derived mainly from simulations.
A.1.2 Power Supply
The MC9S12HZ256 utilizes several pins to supply power to the I/O ports, A/D converter, oscillator and
PLL as well as the digital core.
The VDDA, VSSA pair supplies the A/D converter and the resistor ladder of the internal voltage regulator.
The VDDX1/VSSX1 and VDDX2/VSSX2 pairs supply the I/O pins except PH, PU, PV and PW. VDDR
supplies the internal voltage regulator.
VDDM1/VSSM1, VDDM2/VSSM2 and VDDM3/VSSM3 pairs supply the ports PH, PU, PV and PW.
MC9S12HZ256 Data Sheet, Rev. 2.04
Freescale Semiconductor
623